Based on Bezier curve, experimental design theory, and response surface method, the optimization method for turbine blades is established. The of turbodrill tested bench taken an example, numerical simulation model established using third-order curve fitting blade surfaces. then verified by test experiment data proven to be reliable. structure parameters are defined as independent variables, maximum efficiency objective function. results computational fluid dynamics, first significant...

Quiescence (G0) maintenance and exit are crucial for tissue homeostasis regeneration in mammals. Here, we show that methyl-CpG binding protein 2 (Mecp2) expression is cell cycle-dependent negatively regulates quiescence cultured cells an injury-induced liver mouse model. Specifically, acute reduction of Mecp2 required efficient as deletion accelerates, while overexpression delays exit, forced after conditional knockout rescues cycle reentry. The E3 ligase Nedd4 mediates the ubiquitination...

With the enlargement of power system scale, large amounts electrical equipment are penetrated in to grids, which makes it more difficult locate fault points and judge types. Traditionally, Fourier transform was normally used study singularity signals. However, these based methods, distribution signals could not be obtained, reduced accuracy location type judgment. Therefore, this paper, detection theory wavelet is adopted decompose node voltage when occurs.

In a power grid with high proportion of hydropower, ultra-low frequency oscillation (ULFO) phenomenon usually appears at around 0.05 Hz along extremely low damping, which may greatly influences the security and stability grid's operation. Preliminary operation experiences study show that ULFO can be affected by changing parameters speed-regulating system hydraulic generator unites, however, it is not clear how much contribution each parameter to or whether there exists other factors impact...

Quiescence (G0) maintenance and exit are crucial for tissue homeostasis regeneration in mammals. Here, we show that methyl-CpG binding protein 2 (Mecp2) expression is cell cycle-dependent negatively regulates quiescence cultured cells an injury-induced liver mouse model. Specifically, acute reduction of Mecp2 required efficient as deletion accelerates, while overexpression delays exit, forced after conditional knockout rescues cycle reentry. The E3 ligase Nedd4 mediates the ubiquitination...

In July 2015, a wind-electricity cluster in the Hami area of Xinjiang induced sub-synchronous oscillations area, and it caused three thermal power plants to trip nearby. The field measured data shows that oscillation propagates along specific path complex AC/DC grid with wide-area propagation characteristics. this paper, frequency response characteristics each component are analyzed based on impedance model. Secondly, equivalent signal network studied. description method is proposed....

The success of open source software (OSS) projects relies on voluntary contributions from various community roles. Among these roles, being a committer signifies gaining trust and higher privileges in OSS projects. Substantial studies have focused the requirements becoming projects, but most them are based interviews or several hypotheses, lacking comprehensive understanding committers' qualifications. To address this knowledge gap, we explore both policies practical implementations...

Quiescence (G0) maintenance and exit are crucial for tissue homeostasis regeneration in mammals. Here, we show that methyl-CpG binding protein 2 (Mecp2) expression is cell cycle-dependent negatively regulates quiescence cultured cells an injury-induced liver mouse model. Specifically, acute reduction of Mecp2 required efficient exit, as deletion accelerates, while overexpression delays forced after conditional knockout rescues cycle reentry. The E3 ligase Nedd4 mediates the ubiquitination...

With the rapid development of wind power, turbines are accompanied by a large quantity power electronic converters connected to grid, causing changes in characteristics system and leading increasingly serious sub-synchronous oscillation (SSO) problems, which urgently require generalized classification characterization emerging problems. This paper classifies characterizes types SSO caused grid-connected address these issues. Finally, impact typical parameters on pattern is analyzed depth...

Micro-actuator technology is important base of design and fabrication MEMS. According to a kind bimorph thermal actuator, this paper obtains the deflection temperature distribution MEMS actuator by using finite element analysis. The relationship between some parameter such as length flexure are analyzed in detail. Through simulation comparison, influences on fatigue life verified, which provides good guide for further.

By designing the different formulations of composites and adopting optimized technology including extrusion molding, effects Micro-capsules on properties nylon are analyzed by impact property test. The mechanical glass fiber reinforced is influenced little if content self-healing microcapsules added less than 3.5%, used in polymer composite gear feasible.

In order to reduce vibration and noise of the compressor used in small medium-sized refrigeration unit, this paper designs different isolating systems carries out experiment isolation performance evaluation based on LMS Test. Lab Signature software. The comparison results four show that peak values velocity response each system mainly appear at 25Hz, 50Hz, 75Hz 100Hz, maximum does not exceed 22mm/s which is less than allowed by national standard [1] . And Vibration Level Difference (VLD)...

The mechanical properties of self-healing composite gear with microcapsules can be effectively improved. Based on Finite Elements Analysis method, the modal analysis three different formulations composites have been carried out in order to explore effects microcapsule parameters a gear. comparison results shows that modulus ratio is one important inflencing factors natural frequency study this paper provides good foundation for further research

In order to evaluate the contact strength of a type high-speed train traction motor rotor，in this paper, for high speed test under five working conditions, Based on established rotor 3D model, NX.Nastran environment, pressure between and lamination is analyzed by finite element got stress intensity distribution rotor. The condition include starting, constant work starting condition, rated, short circuit highest condition. result shows that tractor motor, in won't appear shaft laminated...

On the basis of wavelet denoising and its better time-frequency characteristic, this paper presents an effective vibration signal method for food refrigerant air compressor. The solution eliminating strong noise is investigated with combination soft threshold exponential lipschitza. good results show that presented improving ratio builds foundation further extraction signals.

According to the characteristics of self-healing composite gear, mould for gear is designed elaborately in this paper including selection type and material, structure design injection gating system, verification parameters demoulding mechanism. It provides good foundation further manufacture property analysis gear.

The reliability of mechanical component is a time-varied process because the parameters such as operation condition, load, strength, are varied with time or loading numbers. This paper builds time-dependent model when life measured by variety-law component’s lifetime derived from built and simulation picking link rod used in sewing machine. It shown that effective decreases obviously increasing load standard deviation.

The time-dependent reliability model of Mechanical Component is influenced by many parameters such as stress, load, strength, strength degeneration and lifetime index. This paper builds the when life measured loading numbers. variety law mechanical component’s with derived from built simulation link rod in needle bar mechanism used sewing machine. result shows that effective component decreases obviously numbers considered.

The time-dependent reliability model of Mechanical Component is influenced by many parameters such as stress, load, strength, strength degeneration and lifetime index. This paper builds the when life measured loading numbers. variety law mechanical component’s with derived from built simulation tooth carrier in feed mechanism used sewing machine. result shows that effective component decreases obviously numbers considered.

We report the complete genome sequence of Tissierella sp. strain Yu-01 (=BCRC 81391), isolated from feces black soldier fly (Hermetia illucens) larvae. This has increasingly been gaining attention because its usefulness for recycling organic waste. The was selected further species delineation.